There is some exciting news coming out today around tools for transitioning from Lotus to Microsoft that I thought our readers might be interested in. You can find out more about this from a post on the Exchange Server Team Blog "You had me at EHLO.....

FAQ
Question - Is there a way to control the users that are populated in the ABS file or is there a way to filter the address book based on an AD Attribute?
Answer - The users populated in the ABS files can be controlled based on certain AD Attributes...